Cornerstone Commercial Services
General contractor in Mt Airy, MD 21771
About this company
Cornerstone Commercial Services is listed as a general contractor at 206 Hill St in Mt Airy, Maryland, in Frederick County. It is one of 70 general contractors in ZIP 21771.
Other construction companies nearby
Catonsville Homes, CBI Homes LLC112 S Main St, Mt Airy
0.1 mi(443) 829-6371
Robinson Contracting401 Center St, Mount Airy
0.4 mi(301) 703-5225
Redwood Contracting LLC207 Village Way, Mt Airy
0.4 mi(301) 829-5345
Hauptman Builders302 W Watersville Rd, Mount Airy
0.7 mi(301) 831-0711
Ridgeline Contractors4100 W Watersville Rd, Mount Airy
0.8 mi(301) 366-6945
Housing market around ZIP 21771
Figures describe the local area, not this company.
Typical home value$626,000+0.8% past year · +55% in 10 years
12-month value outlook+0.4%Roughly flat
Days to sale agreement16Baltimore metro · 14 a year ago
New homes permitted, 20251,168Frederick County
Listings with a price cut30.2%Baltimore metro
Sale price vs list100.1%Baltimore metro
New construction sales122Baltimore metro, Aug · −37% from last year
Source: Zillow (home values, rent, outlook and metro sales), data through Sep 2026. Permits: U.S. Census Bureau.
Typical home value, last 10 years
Source: Zillow Home Value Index, Sep 2026.
Local building angle: Frederick County permitted 1,168 new homes in 2025, including 354 apartment units. 24% of the homes in this ZIP were built since 2000.
Local figures are estimates from public records and Zillow housing data, updated regularly.